Schneider BMXDDI3202K 32-Input Module 24V DC

BMXDDI3202K – High-Density 32-Channel 24V DC Input

Maximize I/O Points in Less Space

The BMXDDI3202K packs 32 discrete inputs into a single 32mm wide module. This high-density design saves valuable cabinet space while delivering reliable field signal acquisition. It uses positive logic (sink) at 24V DC, making it compatible with standard PNP sensors.

You can wire each channel in 2-wire or 3-wire configuration. The BMXDDI3202K complies with IEC 61131-2 type 3 standards, ensuring robust performance in industrial environments. For Modicon M340 and X80 users, this module offers an excellent solution for applications with many digital inputs.

Key Technical Specifications

Input channels: 32 isolated sink inputs.
Rated voltage: 24V DC.
Input current: 2.5mA at 24V DC (lower than 16-channel version).
On-state voltage guarantee: ≥11V.
Off-state voltage guarantee: <5V.
On-state current guarantee: ≥2mA.
Off-state current guarantee: ≤0.5mA.
Input impedance: 9600 Ohm.
Typical response time: 4ms.
Maximum response time: 7ms.
Sensor power supply range: 19–30V DC.

Please note that paralleling of inputs is not allowed on the BMXDDI3202K. Each input must remain独立的 for proper operation.

Power Consumption and Isolation

Typical current draw: 121mA at 24V DC.
3.3V DC bus consumption: 160mA.
Power dissipation: 3.9W.
Isolation voltage: 1500V AC for 1 minute between channels and the bus.
500V DC for 1 minute between channel groups.
Insulation resistance: >10 MOhm at 500V DC.

The BMXDDI3202K also monitors sensor voltage levels. It reports a sensor fault when voltage drops below 14V DC. Normal sensor operation is confirmed above 18V DC.

Status LEDs and Diagnostics

Local signalling on the BMXDDI3202K includes:

• RUN (green): module operating normally.

• ERR (red): module error.

• I/O (red): input/output fault.

• One green LED per channel (32 total): indicates input signal status.

These LEDs provide immediate visual feedback for each field connection. Troubleshooting becomes much faster without needing a programming laptop.

Mechanical and Environmental Ratings

Dimensions: 134.6mm (H) x 32mm (W) x 86mm (D).
Weight: 0.112 kg.
IP rating: IP20 for protected control cabinets.
Operating temperature: 0…60°C (32…140°F).
Storage temperature: -40…85°C (-40…185°F).
Relative humidity: 5–95% at 55°C, non-condensing.
Operating altitude: 0–2000m normally, up to 5000m with derating.
Vibration resistance: 3gn.
Shock resistance: 30gn.
Pollution degree: 2.

MTBF and Reliability

The BMXDDI3202K offers an exceptional MTBF of 905,000 hours. This high reliability figure means fewer replacements and less unplanned downtime. Hot swapping is fully supported, so you can replace the module while the system continues running.

Installation Guidelines

First, insert the BMXDDI3202K into any standard X80 or M340 I/O slot. The hot-swap feature allows safe removal and insertion without powering down the rack. Next, connect your 24V DC PNP sensors to the 40-pin terminal block. Wire the sensor commons to the module's return terminal. Finally, supply sensor power between 19V and 30V DC.

For optimal noise immunity, separate input wiring from power cables by at least 10cm. Use shielded cables when installing near variable frequency drives or welding equipment.

Compatibility and System Integration

The BMXDDI3202K integrates with:

• Modicon M340 programmable logic controllers

• Modicon X80 I/O racks and platforms

• EcoStruxure Control Expert and Unity Pro software

Moreover, this module works alongside analog, output, and communication modules in the same rack. The BMXDDI3202K uses positive logic only. For negative logic (source) applications with 32 channels, please consider other X80 options.

Comparison with 16-Channel Version

Choose the BMXDDI3202K when you need maximum channel density. Select the BMXDDI1602 when input paralleling or lower power consumption matters more.

Packaging List

• BMXDDI3202K discrete input module (1 unit)

• 40-pin screw terminal block (pre-installed)

• Bus connector cover

• Product quick reference card

Note: No certificates or warranty documents are included. Sensor power supply sold separately.

Shipping & Delivery

All orders ship via FedEx, UPS, or DHL with full tracking. Anti-static packaging protects the module during transit.

Frequently Asked Questions (FAQ)

1. Can the BMXDDI3202K accept NPN sensor signals?
No. This module uses positive logic (sink input), so it requires PNP sensors that source 24V DC when active. For NPN sensors, use a negative logic module instead.

2. Why can't I parallel inputs on the BMXDDI3202K?
The higher channel density and different input circuit design do not support paralleling. Each input must be used independently. Use the 16-channel BMXDDI1602 if paralleling is required.

3. Is the BMXDDI3202K compatible with Modicon M580?
Yes. The Modicon X80 family works with M340, M580, and Quantum platforms using appropriate racks and adapters.

4. How do I know which channel is which on the terminal block?
The terminal block is numbered from 1 to 32. A label strip on the module helps you mark each channel's field device name.

5. What is the typical lifespan of the BMXDDI3202K?
With an MTBF of 905,000 hours (over 103 years), the module typically outlasts the control system itself. Most replacements occur due to external surges, not component aging.